The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2001
Filed:
Nov. 30, 1998
Applicant:
Inventors:
Robert J. Barnett, Goldendale, WA (US);
Michael B. Mezner, Sandy, OR (US);
Assignee:
Goldendale Aluminum Company, Goldendale, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 7/00 ; C01B 7/00 ; C01B 3/100 ; C01C 1/00 ;
U.S. Cl.
CPC ...
C01F 7/00 ; C01B 7/00 ; C01B 3/100 ; C01C 1/00 ;
Abstract
Spent potliner from aluminum reduction cells is treated, for example, with sulfuric acid to recover carbon, silica and alumina or to recover a vitrified product of silca and alumina.